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            <h1>Generate images using <a href="../index.html">stable diffusion</a> with a prompt</h1>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">11</span><span></span><span class="kn">import</span> <span class="nn">argparse</span>
<span class="lineno">12</span><span class="kn">import</span> <span class="nn">os</span>
<span class="lineno">13</span><span class="kn">from</span> <span class="nn">pathlib</span> <span class="kn">import</span> <span class="n">Path</span>
<span class="lineno">14</span>
<span class="lineno">15</span><span class="kn">import</span> <span class="nn">torch</span>
<span class="lineno">16</span>
<span class="lineno">17</span><span class="kn">from</span> <span class="nn">labml</span> <span class="kn">import</span> <span class="n">lab</span><span class="p">,</span> <span class="n">monit</span>
<span class="lineno">18</span><span class="kn">from</span> <span class="nn">labml_nn.diffusion.stable_diffusion.latent_diffusion</span> <span class="kn">import</span> <span class="n">LatentDiffusion</span>
<span class="lineno">19</span><span class="kn">from</span> <span class="nn">labml_nn.diffusion.stable_diffusion.sampler.ddim</span> <span class="kn">import</span> <span class="n">DDIMSampler</span>
<span class="lineno">20</span><span class="kn">from</span> <span class="nn">labml_nn.diffusion.stable_diffusion.sampler.ddpm</span> <span class="kn">import</span> <span class="n">DDPMSampler</span>
<span class="lineno">21</span><span class="kn">from</span> <span class="nn">labml_nn.diffusion.stable_diffusion.util</span> <span class="kn">import</span> <span class="n">load_model</span><span class="p">,</span> <span class="n">save_images</span><span class="p">,</span> <span class="n">set_seed</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-1'>
        <div class='docs doc-strings'>
            <div class='section-link'>
                <a href='#section-1'>#</a>
            </div>
            <h3>Text to image class</h3>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">24</span><span class="k">class</span> <span class="nc">Txt2Img</span><span class="p">:</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-2'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-2'>#</a>
            </div>
            
        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">28</span>    <span class="n">model</span><span class="p">:</span> <span class="n">LatentDiffusion</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-3'>
        <div class='docs doc-strings'>
            <div class='section-link'>
                <a href='#section-3'>#</a>
            </div>
            <ul><li><code  class="highlight"><span></span><span class="n">checkpoint_path</span></code>
  is the path of the checkpoint </li>
<li><code  class="highlight"><span></span><span class="n">sampler_name</span></code>
  is the name of the <a href="../sampler/index.html">sampler</a> </li>
<li><code  class="highlight"><span></span><span class="n">n_steps</span></code>
  is the number of sampling steps </li>
<li><code  class="highlight"><span></span><span class="n">ddim_eta</span></code>
  is the <a href="../sampler/ddim.html">DDIM sampling</a> <span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.625em;vertical-align:-0.19444em;"></span><span class="mord mathnormal" style="margin-right:0.03588em;">η</span></span></span></span></span> constant</li></ul>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">30</span>    <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="p">,</span>
<span class="lineno">31</span>                 <span class="n">checkpoint_path</span><span class="p">:</span> <span class="n">Path</span><span class="p">,</span>
<span class="lineno">32</span>                 <span class="n">sampler_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span>
<span class="lineno">33</span>                 <span class="n">n_steps</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">50</span><span class="p">,</span>
<span class="lineno">34</span>                 <span class="n">ddim_eta</span><span class="p">:</span> <span class="nb">float</span> <span class="o">=</span> <span class="mf">0.0</span><span class="p">,</span>
<span class="lineno">35</span>                 <span class="p">):</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-4'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-4'>#</a>
            </div>
            <p>Load <a href="../latent_diffusion.html">latent diffusion model</a> </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">43</span>        <span class="bp">self</span><span class="o">.</span><span class="n">model</span> <span class="o">=</span> <span class="n">load_model</span><span class="p">(</span><span class="n">checkpoint_path</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-5'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-5'>#</a>
            </div>
            <p>Get device </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">45</span>        <span class="bp">self</span><span class="o">.</span><span class="n">device</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">device</span><span class="p">(</span><span class="s2">&quot;cuda:0&quot;</span><span class="p">)</span> <span class="k">if</span> <span class="n">torch</span><span class="o">.</span><span class="n">cuda</span><span class="o">.</span><span class="n">is_available</span><span class="p">()</span> <span class="k">else</span> <span class="n">torch</span><span class="o">.</span><span class="n">device</span><span class="p">(</span><span class="s2">&quot;cpu&quot;</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-6'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-6'>#</a>
            </div>
            <p>Move the model to device </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">47</span>        <span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="o">.</span><span class="n">to</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">device</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-7'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-7'>#</a>
            </div>
            <p>Initialize <a href="../sampler/index.html">sampler</a> </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">50</span>        <span class="k">if</span> <span class="n">sampler_name</span> <span class="o">==</span> <span class="s1">&#39;ddim&#39;</span><span class="p">:</span>
<span class="lineno">51</span>            <span class="bp">self</span><span class="o">.</span><span class="n">sampler</span> <span class="o">=</span> <span class="n">DDIMSampler</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="p">,</span>
<span class="lineno">52</span>                                       <span class="n">n_steps</span><span class="o">=</span><span class="n">n_steps</span><span class="p">,</span>
<span class="lineno">53</span>                                       <span class="n">ddim_eta</span><span class="o">=</span><span class="n">ddim_eta</span><span class="p">)</span>
<span class="lineno">54</span>        <span class="k">elif</span> <span class="n">sampler_name</span> <span class="o">==</span> <span class="s1">&#39;ddpm&#39;</span><span class="p">:</span>
<span class="lineno">55</span>            <span class="bp">self</span><span class="o">.</span><span class="n">sampler</span> <span class="o">=</span> <span class="n">DDPMSampler</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-8'>
        <div class='docs doc-strings'>
            <div class='section-link'>
                <a href='#section-8'>#</a>
            </div>
            <ul><li><code  class="highlight"><span></span><span class="n">dest_path</span></code>
  is the path to store the generated images </li>
<li><code  class="highlight"><span></span><span class="n">batch_size</span></code>
  is the number of images to generate in a batch </li>
<li><code  class="highlight"><span></span><span class="n">prompt</span></code>
  is the prompt to generate images with </li>
<li><code  class="highlight"><span></span><span class="n">h</span></code>
  is the height of the image </li>
<li><code  class="highlight"><span></span><span class="n">w</span></code>
  is the width of the image </li>
<li><code  class="highlight"><span></span><span class="n">uncond_scale</span></code>
  is the unconditional guidance scale <span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.43056em;vertical-align:0em;"></span><span class="mord coloredeq eqd" style=""><span class="mord mathnormal" style="">s</span></span></span></span></span></span>. This is used for  <span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord"><span class="mord mathnormal">ϵ</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.33610799999999996em;"><span style="top:-2.5500000000000003em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight" style="margin-right:0.02778em;">θ</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mopen">(</span><span class="mord"><span class="mord mathnormal">x</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.2805559999999999em;"><span style="top:-2.5500000000000003em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight">t</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.16666666666666666em;"></span><span class="mord mathnormal">c</span><span class="mclose">)</span><span class="mspace" style="margin-right:0.2777777777777778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right:0.2777777777777778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord coloredeq eqd" style=""><span class="mord mathnormal" style="">s</span></span><span class="mord"><span class="mord mathnormal">ϵ</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.33610799999999996em;"><span style="top:-2.5500000000000003em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord text mtight"><span class="mord mtight">cond</span></span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mopen">(</span><span class="mord"><span class="mord mathnormal">x</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.2805559999999999em;"><span style="top:-2.5500000000000003em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight">t</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.16666666666666666em;"></span><span class="mord mathnormal">c</span><span class="mclose">)</span><span class="mspace" style="margin-right:0.2222222222222222em;"></span><span class="mbin">+</span><span class="mspace" style="margin-right:0.2222222222222222em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mopen">(</span><span class="mord coloredeq eqd" style=""><span class="mord mathnormal" style="">s</span></span><span class="mspace" style="margin-right:0.2222222222222222em;"></span><span class="mbin">−</span><span class="mspace" style="margin-right:0.2222222222222222em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord coloredeq eqc" style=""><span class="mord" style="">1</span></span><span class="mclose">)</span><span class="mord"><span class="mord mathnormal">ϵ</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.33610799999999996em;"><span style="top:-2.5500000000000003em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord text mtight"><span class="mord mtight">cond</span></span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mopen">(</span><span class="mord"><span class="mord mathnormal">x</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.2805559999999999em;"><span style="top:-2.5500000000000003em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight">t</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.16666666666666666em;"></span><span class="mord"><span class="mord mathnormal">c</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.151392em;"><span style="top:-2.5500000000000003em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight">u</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mclose">)</span></span></span></span></span></li></ul>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">57</span>    <span class="nd">@torch</span><span class="o">.</span><span class="n">no_grad</span><span class="p">()</span>
<span class="lineno">58</span>    <span class="k">def</span> <span class="fm">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="p">,</span>
<span class="lineno">59</span>                 <span class="n">dest_path</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span>
<span class="lineno">60</span>                 <span class="n">batch_size</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">3</span><span class="p">,</span>
<span class="lineno">61</span>                 <span class="n">prompt</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span>
<span class="lineno">62</span>                 <span class="n">h</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">512</span><span class="p">,</span> <span class="n">w</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">512</span><span class="p">,</span>
<span class="lineno">63</span>                 <span class="n">uncond_scale</span><span class="p">:</span> <span class="nb">float</span> <span class="o">=</span> <span class="mf">7.5</span><span class="p">,</span>
<span class="lineno">64</span>                 <span class="p">):</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-9'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-9'>#</a>
            </div>
            <p>Number of channels in the image </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">75</span>        <span class="n">c</span> <span class="o">=</span> <span class="mi">4</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-10'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-10'>#</a>
            </div>
            <p>Image to latent space resolution reduction </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">77</span>        <span class="n">f</span> <span class="o">=</span> <span class="mi">8</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-11'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-11'>#</a>
            </div>
            <p>Make a batch of prompts </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">80</span>        <span class="n">prompts</span> <span class="o">=</span> <span class="n">batch_size</span> <span class="o">*</span> <span class="p">[</span><span class="n">prompt</span><span class="p">]</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-12'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-12'>#</a>
            </div>
            <p>AMP auto casting </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">83</span>        <span class="k">with</span> <span class="n">torch</span><span class="o">.</span><span class="n">cuda</span><span class="o">.</span><span class="n">amp</span><span class="o">.</span><span class="n">autocast</span><span class="p">():</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-13'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-13'>#</a>
            </div>
            <p>In unconditional scaling is not <span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.64444em;vertical-align:0em;"></span><span class="mord coloredeq eqc" style=""><span class="mord" style="">1</span></span></span></span></span></span> get the embeddings for empty prompts (no conditioning). </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">85</span>            <span class="k">if</span> <span class="n">uncond_scale</span> <span class="o">!=</span> <span class="mf">1.0</span><span class="p">:</span>
<span class="lineno">86</span>                <span class="n">un_cond</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="o">.</span><span class="n">get_text_conditioning</span><span class="p">(</span><span class="n">batch_size</span> <span class="o">*</span> <span class="p">[</span><span class="s2">&quot;&quot;</span><span class="p">])</span>
<span class="lineno">87</span>            <span class="k">else</span><span class="p">:</span>
<span class="lineno">88</span>                <span class="n">un_cond</span> <span class="o">=</span> <span class="kc">None</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-14'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-14'>#</a>
            </div>
            <p>Get the prompt embeddings </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">90</span>            <span class="n">cond</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="o">.</span><span class="n">get_text_conditioning</span><span class="p">(</span><span class="n">prompts</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-15'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-15'>#</a>
            </div>
            <p><a href="../sampler/index.html">Sample in the latent space</a>. <code  class="highlight"><span></span><span class="n">x</span></code>
 will be of shape <code  class="highlight"><span></span><span class="p">[</span><span class="n">batch_size</span><span class="p">,</span> <span class="n">c</span><span class="p">,</span> <span class="n">h</span> <span class="o">/</span> <span class="n">f</span><span class="p">,</span> <span class="n">w</span> <span class="o">/</span> <span class="n">f</span><span class="p">]</span></code>
 </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">93</span>            <span class="n">x</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">sampler</span><span class="o">.</span><span class="n">sample</span><span class="p">(</span><span class="n">cond</span><span class="o">=</span><span class="n">cond</span><span class="p">,</span>
<span class="lineno">94</span>                                    <span class="n">shape</span><span class="o">=</span><span class="p">[</span><span class="n">batch_size</span><span class="p">,</span> <span class="n">c</span><span class="p">,</span> <span class="n">h</span> <span class="o">//</span> <span class="n">f</span><span class="p">,</span> <span class="n">w</span> <span class="o">//</span> <span class="n">f</span><span class="p">],</span>
<span class="lineno">95</span>                                    <span class="n">uncond_scale</span><span class="o">=</span><span class="n">uncond_scale</span><span class="p">,</span>
<span class="lineno">96</span>                                    <span class="n">uncond_cond</span><span class="o">=</span><span class="n">un_cond</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-16'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-16'>#</a>
            </div>
            <p>Decode the image from the <a href="../model/autoencoder.html">autoencoder</a> </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">98</span>            <span class="n">images</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">model</span><span class="o">.</span><span class="n">autoencoder_decode</span><span class="p">(</span><span class="n">x</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-17'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-17'>#</a>
            </div>
            <p>Save images </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">101</span>        <span class="n">save_images</span><span class="p">(</span><span class="n">images</span><span class="p">,</span> <span class="n">dest_path</span><span class="p">,</span> <span class="s1">&#39;txt_&#39;</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-18'>
        <div class='docs doc-strings'>
            <div class='section-link'>
                <a href='#section-18'>#</a>
            </div>
            <h3>CLI</h3>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">104</span><span class="k">def</span> <span class="nf">main</span><span class="p">():</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-19'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-19'>#</a>
            </div>
            
        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">108</span>    <span class="n">parser</span> <span class="o">=</span> <span class="n">argparse</span><span class="o">.</span><span class="n">ArgumentParser</span><span class="p">()</span>
<span class="lineno">109</span>
<span class="lineno">110</span>    <span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span>
<span class="lineno">111</span>        <span class="s2">&quot;--prompt&quot;</span><span class="p">,</span>
<span class="lineno">112</span>        <span class="nb">type</span><span class="o">=</span><span class="nb">str</span><span class="p">,</span>
<span class="lineno">113</span>        <span class="n">nargs</span><span class="o">=</span><span class="s2">&quot;?&quot;</span><span class="p">,</span>
<span class="lineno">114</span>        <span class="n">default</span><span class="o">=</span><span class="s2">&quot;a painting of a virus monster playing guitar&quot;</span><span class="p">,</span>
<span class="lineno">115</span>        <span class="n">help</span><span class="o">=</span><span class="s2">&quot;the prompt to render&quot;</span>
<span class="lineno">116</span>    <span class="p">)</span>
<span class="lineno">117</span>
<span class="lineno">118</span>    <span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s2">&quot;--batch_size&quot;</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">int</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="mi">4</span><span class="p">,</span> <span class="n">help</span><span class="o">=</span><span class="s2">&quot;batch size&quot;</span><span class="p">)</span>
<span class="lineno">119</span>
<span class="lineno">120</span>    <span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span>
<span class="lineno">121</span>        <span class="s1">&#39;--sampler&#39;</span><span class="p">,</span>
<span class="lineno">122</span>        <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;sampler_name&#39;</span><span class="p">,</span>
<span class="lineno">123</span>        <span class="n">choices</span><span class="o">=</span><span class="p">[</span><span class="s1">&#39;ddim&#39;</span><span class="p">,</span> <span class="s1">&#39;ddpm&#39;</span><span class="p">],</span>
<span class="lineno">124</span>        <span class="n">default</span><span class="o">=</span><span class="s1">&#39;ddim&#39;</span><span class="p">,</span>
<span class="lineno">125</span>        <span class="n">help</span><span class="o">=</span><span class="sa">f</span><span class="s1">&#39;Set the sampler.&#39;</span><span class="p">,</span>
<span class="lineno">126</span>    <span class="p">)</span>
<span class="lineno">127</span>
<span class="lineno">128</span>    <span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s2">&quot;--flash&quot;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store_true&#39;</span><span class="p">,</span> <span class="n">help</span><span class="o">=</span><span class="s2">&quot;whether to use flash attention&quot;</span><span class="p">)</span>
<span class="lineno">129</span>
<span class="lineno">130</span>    <span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s2">&quot;--steps&quot;</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">int</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="mi">50</span><span class="p">,</span> <span class="n">help</span><span class="o">=</span><span class="s2">&quot;number of sampling steps&quot;</span><span class="p">)</span>
<span class="lineno">131</span>
<span class="lineno">132</span>    <span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s2">&quot;--scale&quot;</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">float</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="mf">7.5</span><span class="p">,</span>
<span class="lineno">133</span>                        <span class="n">help</span><span class="o">=</span><span class="s2">&quot;unconditional guidance scale: &quot;</span>
<span class="lineno">134</span>                             <span class="s2">&quot;eps = eps(x, empty) + scale * (eps(x, cond) - eps(x, empty))&quot;</span><span class="p">)</span>
<span class="lineno">135</span>
<span class="lineno">136</span>    <span class="n">opt</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">()</span>
<span class="lineno">137</span>
<span class="lineno">138</span>    <span class="n">set_seed</span><span class="p">(</span><span class="mi">42</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-20'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-20'>#</a>
            </div>
            <p>Set flash attention </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">141</span>    <span class="kn">from</span> <span class="nn">labml_nn.diffusion.stable_diffusion.model.unet_attention</span> <span class="kn">import</span> <span class="n">CrossAttention</span>
<span class="lineno">142</span>    <span class="n">CrossAttention</span><span class="o">.</span><span class="n">use_flash_attention</span> <span class="o">=</span> <span class="n">opt</span><span class="o">.</span><span class="n">flash</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-21'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-21'>#</a>
            </div>
            <p> </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">145</span>    <span class="n">txt2img</span> <span class="o">=</span> <span class="n">Txt2Img</span><span class="p">(</span><span class="n">checkpoint_path</span><span class="o">=</span><span class="n">lab</span><span class="o">.</span><span class="n">get_data_path</span><span class="p">()</span> <span class="o">/</span> <span class="s1">&#39;stable-diffusion&#39;</span> <span class="o">/</span> <span class="s1">&#39;sd-v1-4.ckpt&#39;</span><span class="p">,</span>
<span class="lineno">146</span>                      <span class="n">sampler_name</span><span class="o">=</span><span class="n">opt</span><span class="o">.</span><span class="n">sampler_name</span><span class="p">,</span>
<span class="lineno">147</span>                      <span class="n">n_steps</span><span class="o">=</span><span class="n">opt</span><span class="o">.</span><span class="n">steps</span><span class="p">)</span>
<span class="lineno">148</span>
<span class="lineno">149</span>    <span class="k">with</span> <span class="n">monit</span><span class="o">.</span><span class="n">section</span><span class="p">(</span><span class="s1">&#39;Generate&#39;</span><span class="p">):</span>
<span class="lineno">150</span>        <span class="n">txt2img</span><span class="p">(</span><span class="n">dest_path</span><span class="o">=</span><span class="s1">&#39;outputs&#39;</span><span class="p">,</span>
<span class="lineno">151</span>                <span class="n">batch_size</span><span class="o">=</span><span class="n">opt</span><span class="o">.</span><span class="n">batch_size</span><span class="p">,</span>
<span class="lineno">152</span>                <span class="n">prompt</span><span class="o">=</span><span class="n">opt</span><span class="o">.</span><span class="n">prompt</span><span class="p">,</span>
<span class="lineno">153</span>                <span class="n">uncond_scale</span><span class="o">=</span><span class="n">opt</span><span class="o">.</span><span class="n">scale</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-22'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-22'>#</a>
            </div>
            <p> </p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">157</span><span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s2">&quot;__main__&quot;</span><span class="p">:</span>
<span class="lineno">158</span>    <span class="n">main</span><span class="p">()</span></pre></div>
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